Submission #1040217

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040217		dpsaveslives	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	36 / 100	1097 ms	66132 KiB

skyscraper

#include <bits/stdc++.h>
#define f first
#define s second
#define ll long long
using namespace std;
const int MAXN = 3e4+10;
vector<pair<int,ll>> adj[MAXN];
int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N,M; cin >> N >> M;
    vector<pair<int,int>> doges(M);
    for(int i = 0;i<M;++i){
        cin >> doges[i].f >> doges[i].s;
    }
    for(int i = 0;i<M;++i){
        for(int j = i+1;j<M;++j){
            if(doges[j].f == doges[i].f){
                adj[i].push_back({j,0});
                adj[j].push_back({i,0});
                //cout << i << " " << j << "\n";
                //cout << j << " " << i << "\n";
                continue;
            }
            if((abs(doges[j].f-doges[i].f)) % doges[i].s == 0){
                //cout << j << " " << i << "\n"; //j to i
                adj[j].push_back({i,abs(doges[j].f-doges[i].f)/doges[i].s});  //start from the target (1), the directed edges are directed towards 0
            }
            if((abs(doges[j].f-doges[i].f)) % doges[j].s == 0){
                //cout << i << " " << j << "\n"; //i to j
                adj[i].push_back({j,abs(doges[j].f-doges[i].f)/doges[j].s});
            }
        }
    }
    priority_queue<pair<ll,int>> pq; pq.push({0,1});
    vector<ll> dist(M,-1); dist[1] = 0;
    while(!pq.empty()){
        int u = pq.top().s; ll cd = pq.top().f; pq.pop();
        if(cd != dist[u]) continue;
        for(auto p : adj[u]){
            if(cd+p.s < dist[p.f] || dist[p.f] == -1){
                dist[p.f] = cd+p.s;
                pq.push({dist[p.f],p.f});
            }
        }
    }
    cout << dist[0] << "\n";
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 12 / 12
• Subtask 3: 14 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43